{layout name="../../admin/view/layout/main" /}
{:breadcrumb(['UI 示例:example/layout/index', '上传插件:example/upload/index', 'webuploader(图片)'])}
<style>
  .example {
      position: relative;
      background-color: #fafafa;
  }
  #uploader .queueList {
      border: 3px dashed #ececec;
  }
  #uploader .queueList.filled {
      padding: 17px;
      margin: 0;
      border: 3px dashed transparent;
  }
  #uploader .queueList.webuploader-dnd-over {
      border: 3px dashed #999999;
  }
  #uploader p {
      margin: 0;
  }
  .element-invisible {
      position: absolute !important;
      clip: rect(1px 1px 1px 1px); /* IE6, IE7 */
      clip: rect(1px,1px,1px,1px);
  }
  #uploader .uploader-placeholder {
      min-height: 350px;
      padding-top: 100px;
      text-align: center;
      color: #cccccc;
      position: relative;
  }
  #uploader .uploader-placeholder:before {
      font-family: "Material Design Icons";
      font-size: 50px;
      content: "\f0552";
  }
  #uploader .uploader-placeholder .webuploader-pick {
      font-size: 18px;
      line-height: 44px;
      padding: 0 30px;
      *width: 120px;
      color: #fff;
      margin: 0 auto 20px auto;
      box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
  }
  #uploader .uploader-placeholder .flashTip {
      color: #666666;
      font-size: 12px;
      position: absolute;
      width: 100%;
      text-align: center;
      bottom: 20px;
  }
  #uploader .uploader-placeholder .flashTip a {
      color: #0785d1;
      text-decoration: none;
  }
  #uploader .uploader-placeholder .flashTip a:hover {
      text-decoration: underline;
  }
  #uploader .filelist {
      list-style: none;
      margin: 0;
      padding: 0;
  }
  #uploader .filelist:after {
      content: '';
      display: block;
      width: 0;
      height: 0;
      overflow: hidden;
      clear: both;
  }
  #uploader .filelist li {
      width: 110px;
      height: 110px;
      background-color: #fafafa;
      text-align: center;
      margin: 0 8px 20px 0;
      position: relative;
      display: inline;
      float: left;
      overflow: hidden;
      font-size: 12px;
  }
  #uploader .filelist li p.log {
      position: relative;
      top: -45px;
  }
  #uploader .filelist li p.title {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      overflow: hidden;
      white-space: nowrap;
      text-overflow : ellipsis;
      top: 5px;
      text-indent: 5px;
      text-align: left;
  }
  #uploader .filelist li p.progress {
      position: absolute;
      width: 100%;
      height: 8px;
      bottom: 0;
      left: 0;
      overflow: hidden;
      z-index: 50;
      margin: 0;
      -webkit-border-radius: 0;
      border-radius: 0;
      background-color: transparent;
      -webkit-box-shadow: 0 0 0;
  }
  #uploader .filelist li p.imgWrap {
      position: relative;
      z-index: 2;
      line-height: 110px;
      vertical-align: middle;
      overflow: hidden;
      width: 110px;
      height: 110px;
  
      -webkit-transform-origin: 50% 50%;
      -moz-transform-origin: 50% 50%;
      -o-transform-origin: 50% 50%;
      -ms-transform-origin: 50% 50%;
      transform-origin: 50% 50%;
  
      -webit-transition: 200ms ease-out;
      -moz-transition: 200ms ease-out;
      -o-transition: 200ms ease-out;
      -ms-transition: 200ms ease-out;
      transition: 200ms ease-out;
  }
  #uploader .filelist li img {
      width: 100%;
      vertical-align: bottom;
  }
  #uploader .filelist li p.error {
      background: #f43838;
      color: #fff;
      position: absolute;
      bottom: 0;
      left: 0;
      height: 28px;
      line-height: 28px;
      width: 100%;
      z-index: 100;
  }
  #uploader .filelist li .success {
      display: block;
      position: absolute;
      right: 0;
      bottom: 0;
      width: 0px;
      height: 0px;
      border-bottom: 40px solid #33cabb;
      border-left: 40px solid transparent;
      z-index: 200;
  }
  #uploader .filelist li .success:after {
      font-family: "Material Design Icons";
      font-size: 22px;
      content: "\F012C";
      position: absolute;
      right: 0px;
      bottom: -43px;
      color: #fff;
  }
  #uploader .filelist div.file-panel {
      position: absolute;
      height: 0;
      filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#80000000', endColorstr='#80000000')\0;
      background: rgba( 0, 0, 0, 0.5 );
      width: 100%;
      top: 0;
      left: 0;
      overflow: hidden;
      z-index: 300;
  }
  #uploader .filelist div.file-panel span {
      width: 24px;
      height: 24px;
      display: inline;
      float: right;
      overflow: hidden;
      margin: 5px 1px 1px;
      cursor: pointer;
      font-family: "Material Design Icons";
      font-size: 14px;
      color: #33cabb;
    -webkit-transition: .2s linear;
    transition: .2s linear
  }
  #uploader .filelist div.file-panel span.rotateLeft:after {
      content: "\F0465";
  }
  #uploader .filelist div.file-panel span.rotateRight:after {
      content: "\F0467";
  }
  #uploader .filelist div.file-panel span.cancel:after {
      content: "\F01B4";
  }
  #uploader .filelist div.file-panel span.rotateLeft:hover,
  #uploader .filelist div.file-panel span.rotateRight:hover,
  #uploader .filelist div.file-panel span.cancel:hover {
      color: #fff;
  }
  #uploader .statusBar {
      height: 63px;
      border-top: 1px solid rgba(77,82,89,0.05);
      padding: 0 20px;
      line-height: 63px;
      vertical-align: middle;
      position: relative;
  }
  #uploader .statusBar .progress {
      width: 198px;
      display: inline-block;
      text-align: center;
      position: relative;
      margin: 0 10px 0 0;
  }
  #uploader .statusBar .info {
      display: inline-block;
  }
  #uploader .statusBar .btns {
      position: absolute;
      top: 10px;
      right: 20px;
      line-height: 36px;
  }
  #filePickerBtn {
      display: inline-block;
      float: left;
  }
  #uploader .statusBar .btns .webuploader-pick,
  #uploader .statusBar .btns .uploadBtn,
  #uploader .statusBar .btns .uploadBtn.state-uploading,
  #uploader .statusBar .btns .uploadBtn.state-paused {
      background: #fcfdfe;
      border: 1px solid #ebebeb;
      color: #8b95a5;
      padding: 0px 12px;
      display: inline-block;
      border-radius: 2px;
      margin-left: 10px;
      cursor: pointer;
      font-size: 14px;
      float: left;
      line-height: 36px;
  }
  #uploader .statusBar .btns .webuploader-pick-hover,
  #uploader .statusBar .btns .uploadBtn.state-uploading:hover,
  #uploader .statusBar .btns .uploadBtn.state-paused:hover {
    background-color: #f9fafb;
    border-color: #ebebeb;
    color: #4d5259
  }
  #uploader .statusBar .btns .uploadBtn {
      background: #33cabb;
      color: #fff;
      border-color: #33cabb;
  }
  #uploader .statusBar .btns .uploadBtn:hover {
      background: #52d3c7;
      border-color: #52d3c7;
      color: #fff;
  }
  #uploader .statusBar .btns .uploadBtn.disabled {
      pointer-events: none;
      opacity: 0.6;
  }
  [data-theme='dark'] #uploader,
  [data-theme|='translucent'] #uploader {
      background-color: rgba(var(--bs-white-rgb), .2);
      border-color: rgba(var(--bs-white-rgb), .2);
  }
  [data-theme='dark'] #uploader .queueList,
  [data-theme|='translucent'] #uploader .queueList {
      border-color: rgba(var(--bs-white-rgb), .2);
  }
  </style>

<div class="row">

  <div class="col-lg-12">
    <div class="card">
      <header class="card-header">
        <div class="card-title">上传插件 webuploader(可拖放的上传)</div>
      </header>
    <div class="card-body">
        
      <p>来源于webuploader官方demo，这里结合模板对相关内容进行调整和修改。您可以尝试文件拖拽，使用QQ截屏工具，然后激活窗口后粘贴，或者点击添加图片按钮，来体验此示例。</p>
        <div id="uploader" class="example">
          <input type="hidden" name="pics" value="" />
          <div class="queueList">
            <div id="dndArea" class="uploader-placeholder">
              <div id="filePicker"></div>
              <p>或将照片拖到这里，单次最多可选300张</p>
            </div>
          </div>
          <div class="statusBar" style="display:none;">
            <div class="progress">
              <div class="progress-bar progress-bar-striped active">0%</div>
            </div>
            <div class="info"></div>
            <div class="btns">
              <div id="filePickerBtn"></div><div class="uploadBtn">开始上传</div>
            </div>
          </div>
        </div>
        
      </div>
    </div>
  </div>

</div>

<script type="text/javascript">
  jQuery(function() {
      var $ = jQuery,    // just in case. Make sure it's not an other libaray.
  
          $wrap = $('#uploader'),
  
          // 图片容器
          $queue = $('<ul class="filelist"></ul>').appendTo( $wrap.find('.queueList') ),
  
          // 状态栏，包括进度和控制按钮
          $statusBar = $wrap.find('.statusBar'),
  
          // 文件总体选择信息。
          $info = $statusBar.find('.info'),
  
          // 上传按钮
          $upload = $wrap.find('.uploadBtn'),
  
          // 没选择文件之前的内容。
          $placeHolder = $wrap.find('.uploader-placeholder'),
  
          // 总体进度条
          $progress = $statusBar.find('.progress').hide(),
  
          // 添加的文件数量
          fileCount = 0,
  
          // 添加的文件总大小
          fileSize = 0,
  
          // 优化retina, 在retina下这个值是2
          ratio = window.devicePixelRatio || 1,
  
          // 缩略图大小
          thumbnailWidth = 110 * ratio,
          thumbnailHeight = 110 * ratio,
  
          // 可能有pedding, ready, uploading, confirm, done.
          state = 'pedding',
  
          // 所有文件的进度信息，key为file id
          percentages = {},
  
          supportTransition = (function(){
              var s = document.createElement('p').style,
                  r = 'transition' in s ||
                        'WebkitTransition' in s ||
                        'MozTransition' in s ||
                        'msTransition' in s ||
                        'OTransition' in s;
              s = null;
              return r;
          })(),
          
          // 允许上传的格式
          acceptExtensions = 'gif,jpg,jpeg,bmp,png',
          
          // 允许上传的文件数量
          fileNumLimit = 50,
          
          // 总文件大小限制
          fileSizeLimit = 50 * 1024 * 1024,
          
          // 单个文件大小限制
          fileSingleSizeLimit = 2 * 1024 * 1024,
  
          // WebUploader实例
          uploader;
  
      if ( !WebUploader.Uploader.support() ) {
          alert( 'Web Uploader 不支持您的浏览器！如果你使用的是IE浏览器，请尝试升级 flash 播放器');
          throw new Error( 'WebUploader does not support the browser you are using.' );
      }
  
      // 实例化
      uploader = WebUploader.create({
          pick: {
              id: '#filePicker',
              label: '点击选择图片'
          },
          dnd: '#uploader .queueList',
          paste: document.body,
  
          accept: {
              title: 'Images',
              extensions: acceptExtensions,
              mimeTypes: 'image/*'
          },
  
          // swf文件路径
          swf: '/js/webuploader/Uploader.swf',
  
          disableGlobalDnd: true,
  
          chunked: true,
          server: "{:url('example/upload/webuploader')}",
          fileNumLimit: fileNumLimit,
          fileSizeLimit: fileSizeLimit,
          fileSingleSizeLimit: fileSingleSizeLimit
      });
  
      // 添加“添加文件”的按钮，
      uploader.addButton({
          id: '#filePickerBtn',
          label: '继续添加'
      });
  
      // 当有文件添加进来时执行，负责view的创建
      function addFile( file ) {
          var $li = $( '<li id="' + file.id + '">' +
                  '<p class="title">' + file.name + '</p>' +
                  '<p class="imgWrap"></p>'+
                  '<p class="progress"><span class="progress-bar progress-bar-striped active"></span></p>' + 
                  '</li>' ),
  
              $btns = $('<div class="file-panel">' +
                  '<span class="cancel"></span>' +
                  '<span class="rotateRight"></span>' +
                  '<span class="rotateLeft"></span></div>').appendTo( $li ),
              $prgress = $li.find('p.progress .progress-bar'),
              $wrap = $li.find( 'p.imgWrap' ),
              $info = $('<p class="error"></p>'),
  
              showError = function( code ) {
                  switch( code ) {
                      case 'exceed_size':
                          text = '文件大小超出';
                          break;
  
                      case 'interrupt':
                          text = '上传暂停';
                          break;
                      
                      case 'http':
                          text = 'http请求错误';
                          break;
                      
                      case 'not_allow_type':
                          text = '文件格式不允许';
                          break;
  
                      default:
                          text = '上传失败，请重试';
                          break;
                  }
  
                  $info.text( text ).appendTo( $li );
              };
  
          if ( file.getStatus() === 'invalid' ) {
              showError( file.statusText );
          } else {
              // @todo lazyload
              $wrap.text( '预览中' );
              uploader.makeThumb( file, function( error, src ) {
                  if ( error ) {
                      $wrap.text( '不能预览' );
                      return;
                  }
  
                  var img = $('<img src="'+src+'">');
                  $wrap.empty().append( img );
              }, thumbnailWidth, thumbnailHeight );
  
              percentages[ file.id ] = [ file.size, 0 ];
              file.rotation = 0;
              
              /* 检查文件格式 */
              if (!file.ext || acceptExtensions.indexOf(file.ext.toLowerCase()) == -1) {
                  showError( 'not_allow_type' );
                  //uploader.removeFile(file);
              }
          }
  
          file.on('statuschange', function( cur, prev ) {
              if ( prev === 'progress' ) {
                  $prgress.hide().width(0);
              } else if ( prev === 'queued' ) {
                  $li.off( 'mouseenter mouseleave' );
                  $btns.remove();
              }
  
              // 成功
              if ( cur === 'error' || cur === 'invalid' ) {
                  console.log( file.statusText );
                  showError( file.statusText );
                  percentages[ file.id ][ 1 ] = 1;
              } else if ( cur === 'interrupt' ) {
                  showError( 'interrupt' );
              } else if ( cur === 'queued' ) {
                  percentages[ file.id ][ 1 ] = 0;
              } else if ( cur === 'progress' ) {
                  $info.remove();
                  $prgress.css('display', 'block');
              } else if ( cur === 'complete' ) {
                  $li.append( '<span class="success"></span>' );
              }
  
              $li.removeClass( 'state-' + prev ).addClass( 'state-' + cur );
          });
  
          $li.on( 'mouseenter', function() {
              $btns.stop().animate({height: 30});
          });
  
          $li.on( 'mouseleave', function() {
              $btns.stop().animate({height: 0});
          });
  
          $btns.on( 'click', 'span', function() {
              var index = $(this).index(),
                  deg;
  
              switch ( index ) {
                  case 0:
                      uploader.removeFile( file );
                      return;
  
                  case 1:
                      file.rotation += 90;
                      break;
  
                  case 2:
                      file.rotation -= 90;
                      break;
              }
  
              if ( supportTransition ) {
                  deg = 'rotate(' + file.rotation + 'deg)';
                  $wrap.css({
                      '-webkit-transform': deg,
                      '-mos-transform': deg,
                      '-o-transform': deg,
                      'transform': deg
                  });
              } else {
                  $wrap.css( 'filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation='+ (~~((file.rotation/90)%4 + 4)%4) +')');
              }
  
  
          });
  
          $li.appendTo( $queue );
      }
      
      // 统计队列内未完成上传的数量
      function getQueueCount() {
          var file, i, status, readyFile = 0, files = uploader.getFiles();
          
          for (i = 0; file = files[i++]; ) {
              status = file.getStatus();
              if (status == 'inited' || status == 'queued' || status == 'uploading' || status == 'progress') readyFile++;
          }
          
          return readyFile;
      }
  
      // 负责view的销毁
      function removeFile( file ) {
          var $li = $('#'+file.id);
  
          delete percentages[ file.id ];
          updateTotalProgress();
          $li.off().find('.file-panel').off().end().remove();
      }
  
      function updateTotalProgress() {
          var loaded = 0,
              total = 0,
              span  = $progress.find('.progress-bar'),
              percent;
  
          $.each( percentages, function( k, v ) {
              total += v[ 0 ];
              loaded += v[ 0 ] * v[ 1 ];
          } );
  
          percent = total ? loaded / total : 0;
          
          span.text( Math.round( percent * 100 ) + '%' );
          span.css( 'width', Math.round( percent * 100 ) + '%' );
          updateStatus();
      }
  
      function updateStatus() {
          var text = '', stats;
  
          if ( state === 'ready' ) {
              text = '选中' + fileCount + '张图片，共' +
                      WebUploader.formatSize( fileSize ) + '。';
          } else if ( state === 'confirm' ) {
              stats = uploader.getStats();
              if ( stats.uploadFailNum ) {
                  text = '已成功上传' + stats.successNum+ '张照片至XX相册，'+
                      stats.uploadFailNum + '张照片上传失败，<a class="retry" href="#">重新上传</a>失败图片或<a class="ignore" href="#">忽略</a>'
              }
  
          } else {
              stats = uploader.getStats();
              text = '共' + fileCount + '张（' +
                      WebUploader.formatSize( fileSize )  +
                      '），已上传' + stats.successNum + '张';
  
              if ( stats.uploadFailNum ) {
                  text += '，失败' + stats.uploadFailNum + '张';
              }
          }
  
          $info.html( text );
      }
  
      function setState( val ) {
          var file, stats;
  
          if ( val === state ) {
              return;
          }
  
          $upload.removeClass( 'state-' + state );
          $upload.addClass( 'state-' + val );
          state = val;
  
          switch ( state ) {
              case 'pedding':
                  $placeHolder.removeClass( 'element-invisible' );
                  $queue.parent().removeClass('filled');
                  $queue.hide();
                  $statusBar.addClass( 'element-invisible' );
                  uploader.refresh();
                  break;
  
              case 'ready':
                  $placeHolder.addClass( 'element-invisible' );
                  $( '#filePickerBtn' ).removeClass( 'element-invisible');
                  $queue.parent().addClass('filled');
                  $queue.show();
                  $statusBar.removeClass('element-invisible');
                  uploader.refresh();
                  break;
  
              case 'uploading':
                  $progress.show();
                  $upload.text( '暂停上传' );
                  break;
  
              case 'paused':
                  $progress.show();
                  $upload.text( '继续上传' );
                  break;
  
              case 'confirm':
                  $progress.hide();
                  $upload.text( '开始上传' ).addClass( 'disabled' );
  
                  stats = uploader.getStats();
                  if ( stats.successNum && !stats.uploadFailNum ) {
                      setState( 'finish' );
                      return;
                  }
                  break;
              case 'finish':
                  stats = uploader.getStats();
                  if ( stats.successNum ) {
                      console.log( '上传成功' );
                  } else {
                      // 没有成功的图片，重设
                      state = 'done';
                      location.reload();
                  }
                  break;
          }
  
          updateStatus();
          
          if (!getQueueCount()) {
              $upload.addClass('disabled');
          } else {
              $upload.removeClass('disabled');
          }
      }
  
      uploader.onUploadProgress = function( file, percentage ) {
          var $li = $('#'+file.id),
              $percent = $li.find('.progress .progress-bar');
  
          $percent.css( 'width', percentage * 100 + '%' );
          percentages[ file.id ][ 1 ] = percentage;
          updateTotalProgress();
      };
      
      uploader.onUploadSuccess = function( file, response ) {
          var $input_file = $wrap.find('input[type="hidden"]');
          if ($input_file.val()) {
              $input_file.val($input_file.val() + ',' + response.id);
          } else {
              $input_file.val(response.id);
          }
      };
  
      uploader.onFileQueued = function( file ) {
          fileCount++;
          fileSize += file.size;
  
          if ( fileCount === 1 ) {
              $placeHolder.addClass( 'element-invisible' );
              $statusBar.show();
          }
  
          addFile( file );
          setState( 'ready' );
          updateTotalProgress();
      };
  
      uploader.onFileDequeued = function( file ) {
          fileCount--;
          fileSize -= file.size;
  
          if ( !fileCount ) {
              setState( 'pedding' );
          }
  
          removeFile( file );
          updateTotalProgress();
  
      };
  
      uploader.on( 'all', function( type ) {
          var stats;
          switch( type ) {
              case 'uploadFinished':
                  setState( 'confirm' );
                  break;
  
              case 'startUpload':
                  setState( 'uploading' );
                  break;
  
              case 'stopUpload':
                  setState( 'paused' );
                  break;
  
          }
      });
  
      uploader.onError = function( code ) {
          if ( code == "Q_EXCEED_NUM_LIMIT" ) {
              alert( "最多传5张照片" );
          } else if ( code == "F_DUPLICATE" ) {
              alert( "文件已存在队列中" );
          } else if ( code == "Q_TYPE_DENIED" ) {
              alert( "文件类型不满足" );
          } else if ( code == "F_EXCEED_SIZE" ) {
              alert( "文件大小不能超过" + fileSingleSizeLimit / (1024 * 1024) + " M" );
          } else if ( code == "Q_EXCEED_SIZE_LIMIT") {
             alert("添加的文件总大小不能超过 " + fileSizeLimit / (1024 * 1024) + " M");
          }
      };
  
      $upload.on('click', function() {
          if ( $(this).hasClass( 'disabled' ) ) {
              return false;
          }
  
          if ( state === 'ready' ) {
              uploader.upload();
          } else if ( state === 'paused' ) {
              uploader.upload();
          } else if ( state === 'uploading' ) {
              uploader.stop();
          }
      });
  
      $info.on( 'click', '.retry', function() {
          uploader.retry();
      } );
  
      $info.on( 'click', '.ignore', function() {
          alert( 'todo' );
      } );
  
      $upload.addClass( 'state-' + state );
      updateTotalProgress();
  });
  </script>